G IIB Performance

[BoilerUP]

go to gulfstream.com/product support/tech publications/GII/noise information manual.

Here's the direct link:

http://www.gulfstream.com/product_support/technical_pubs/pdfs/noisemanual.pdf

 

[semperfido]

BU- you da man- I was just too lazy to look it up

 

[FO4life]

Thanks, that helps alot. now I got concrete numbers.

 

[PilotKitch]

As far as the hush kits and TEB goes, once you get the hang of the aircraft the sensors become a non-factor (with or without the hush kits). The IIB is a great aircraft and you should be able to pick one up pretty cheap these days.

Also, Naples FL is not a big fan of the GII/III's

 

[cyork25]

we have a III with hush kits, flown it all over the world, never had a problem. It is all in how you fly it. Use Flex power for TO's when you can and get your foot our of it asap and you won't have too many problems. Lots of power and goes a long way, 7 hrs you will land with about 4000 lbs, oh yeah and makes a lot of smoke.

 

[K.V.]

we have a III with hush kits, flown it all over the world, never had a problem. It is all in how you fly it. Use Flex power for TO's when you can and get your foot our of it asap and you won't have too many problems. Lots of power and goes a long way, 7 hrs you will land with about 4000 lbs, oh yeah and makes a lot of smoke.

Even though it sounds kind of backwards, using Min EPR for departures is the proper procedure for "quiet flying". The logic behind it is that you get up sooner and leave the "noise" on the airfield. Also, once airborne it gives you the shortest horizontal distance before reducing to climb power, which saves you from ringing the bell at the end of the runway.

 

[Deskdriver101]

If noise is an issue (and it will be), make sure it has been updated w/stage III hush kits, most 1159's have "hush kits" but they are the air diffuser cookie cutter things that allowed the aircraft to meet stage II noise requirements back in the 80's
Stage III hush kits add approx $500 - $700 to the price of the aircraft and I believe there is also a slight performance penalty. GII's driver's help me out on that

 

[PlaneStupid]

With the price of a G4 now, why not go that direction? A IIB is cheap, but could cost more in the operating costs in the long run.

 

[cyork25]

I can buy that and I believe you could be right. But, I also believe the hushkits are certified stage III at all temps and weights. Thus making it quieter to apply less power through the takeoff, given that using flex power is just like flying it at a higher temp. It is easier on the machine and makes less total noise to use flex power, that is why we do it. These birds are old, they need to be babied.

Even though it sounds kind of backwards, using Min EPR for departures is the proper procedure for "quiet flying". The logic behind it is that you get up sooner and leave the "noise" on the airfield. Also, once airborne it gives you the shortest horizontal distance before reducing to climb power, which saves you from ringing the bell at the end of the runway.

 

[TimsKeeper]

takeoff

The noise considerations aren't with the "take-off", it's with the climb-out. The Gulfstream procedure for quiet flying is to use Min Epr to get you in the air as soon as possible.

If you are trying to do a quiet take-off using flex power in a GII/GIII (with or without hush kits) you haven't been paying attention in ground school. Get a copy of the noise manual somone referred to earlier in this thread...it's good information on specific departures. If noise isn't a consideration then yeah, I fully agree, flex it.